Artscroll is brilliant, but we need more of the me’akev texts translated, which would to my mind, mean the main Rishonim on Shas that constitute the yeshiva curriculum (Ramban, Rashba, Ran, Tosfos Rid, Meiri, Ritva, etc. on each daf). Such texts would sell like hotcakes.
(Rambam, Shulchan Aruch are mostly available now, just leaving a hole of rishonim and acharonim, and with the shiurim of R’ Shalom Rosner and Shas Illuminated, I am confident we will see some development in this area).